linux-stable.git/kernel, branch v3.8.1

futex: Revert "futex: Mark get_robust_list as deprecated"

2013-02-28T13:38:31+00:00

commit fe2b05f7ca9f906be61dced5489f63b8b4d7c770 upstream.

This reverts commit ec0c4274e33c0373e476b73e01995c53128f1257.

get_robust_list() is in use and a removal would break existing user
space. With the permission checks in place it's not longer a security
hole. Remove the deprecation warnings.

Signed-off-by: Thomas Gleixner 
Cc: Cyrill Gorcunov 
Cc: Richard Weinberger 
Cc: akpm@linux-foundation.org
Cc: paul.gortmaker@windriver.com
Cc: davej@redhat.com
Cc: keescook@chromium.org
Cc: ebiederm@xmission.com
Signed-off-by: Greg Kroah-Hartman

workqueue: un-GPL function delayed_work_timer_fn()

2013-02-28T13:38:29+00:00

commit 1438ade5670b56d5386c220e1ad4b5a824a1e585 upstream.

commit d8e794dfd51c368ed3f686b7f4172830b60ae47b ("workqueue: set
delayed_work->timer function on initialization") exports function
delayed_work_timer_fn() only for GPL modules. This makes delayed-works
unusable for non-GPL modules, because initialization macro now requires
GPL symbol. For example schedule_delayed_work() available for non-GPL.

Signed-off-by: Konstantin Khlebnikov 
Signed-off-by: Tejun Heo 
Signed-off-by: Greg Kroah-Hartman

hrtimer: Prevent hrtimer_enqueue_reprogram race

2013-02-28T13:38:29+00:00

commit b22affe0aef429d657bc6505aacb1c569340ddd2 upstream.

hrtimer_enqueue_reprogram contains a race which could result in
timer.base switch during unlock/lock sequence.

hrtimer_enqueue_reprogram is releasing the lock protecting the timer
base for calling raise_softirq_irqsoff() due to a lock ordering issue
versus rq->lock.

If during that time another CPU calls __hrtimer_start_range_ns() on
the same hrtimer, the timer base might switch, before the current CPU
can lock base->lock again and therefor the unlock_timer_base() call
will unlock the wrong lock.

[ tglx: Added comment and massaged changelog ]

Signed-off-by: Leonid Shatz 
Signed-off-by: Izik Eidus 
Cc: Andrea Arcangeli 
Link: http://lkml.kernel.org/r/1359981217-389-1-git-send-email-izik.eidus@ravellosystems.com
Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

posix-cpu-timers: Fix nanosleep task_struct leak

2013-02-28T13:38:28+00:00

commit e6c42c295e071dd74a66b5a9fcf4f44049888ed8 upstream.

The trinity fuzzer triggered a task_struct reference leak via
clock_nanosleep with CPU_TIMERs. do_cpu_nanosleep() calls
posic_cpu_timer_create(), but misses a corresponding
posix_cpu_timer_del() which leads to the task_struct reference leak.

Reported-and-tested-by: Tommi Rantala 
Signed-off-by: Stanislaw Gruszka 
Cc: Dave Jones 
Cc: John Stultz 
Cc: Oleg Nesterov 
Link: http://lkml.kernel.org/r/20130215100810.GF4392@redhat.com
Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

genirq: Avoid deadlock in spurious handling

2013-02-28T13:38:28+00:00

commit e716efde75267eab919cdb2bef5b2cb77f305326 upstream.

commit 52553ddf(genirq: fix regression in irqfixup, irqpoll)
introduced a potential deadlock by calling the action handler with the
irq descriptor lock held.

Remove the call and let the handling code run even for an interrupt
where only a single action is registered. That matches the goal of
the above commit and avoids the deadlock.

Document the confusing action = desc->action reload in the handling
loop while at it.

Reported-and-tested-by: "Wang, Warner" 
Tested-by: Edward Donovan 
Cc: "Wang, Song-Bo (Stoney)" 
Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

timeconst.pl: Eliminate Perl warning

2013-02-28T13:38:28+00:00

commit 63a3f603413ffe82ad775f2d62a5afff87fd94a0 upstream.

defined(@array) is deprecated in Perl and gives off a warning.
Restructure the code to remove that warning.

[ hpa: it would be interesting to revert to the timeconst.bc script.
  It appears that the failures reported by akpm during testing of
  that script was due to a known broken version of make, not a problem
  with bc.  The Makefile rules could probably be restructured to avoid
  the make bug, or it is probably old enough that it doesn't matter. ]

Reported-by: Andi Kleen 
Signed-off-by: H. Peter Anvin 
Cc: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

kernel/pid.c: reenable interrupts when alloc_pid() fails because init has exited

2013-02-12T22:34:00+00:00

We're forgetting to reenable local interrupts on an error path.

Signed-off-by: "Eric W. Biederman" 
Reported-by: Josh Boyer 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-02-04T20:58:24+00:00

Pull scheduler fixes from Ingo Molnar:
 "Three small fixlets"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/debug: Fix format string for 32-bit platforms
  sched: Fix warning in kernel/sched/fair.c
  sched/rt: Use root_domain of rt_rq not current processor

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-02-04T20:57:09+00:00

Pull perf fixes from Ingo Molnar:
 "Three fixlets and two small (and low risk) hw-enablement changes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Fix event group context move
  x86/perf: Add IvyBridge EP support
  perf/x86: Fix P6 driver section warning
  arch/x86/tools/insn_sanity.c: Identify source of messages
  perf/x86: Enable Intel Lincroft/Penwell/Cloverview Atom support

Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2013-02-04T20:56:07+00:00

Pull two small RCU fixlets from Ingo Molnar.

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rcu: Make rcu_nocb_poll an early_param instead of module_param
  rcu: Prevent soft-lockup complaints about no-CBs CPUs